Ventilator



G. E. BLACK VENTILATOR July 30, 1935.

Filed Dec. 12, 1934 Patented July 30, 1935 VENTILATOR George E. Black, Sewickley, Pa., assignor to H. H.

Robertson Company, Pittsburgh, Pa., a corporation of Pennsylvania Application December 12, 1034, Serial No. 757,187

4 Claims.

This invention relates to ventilators of the stationary type in which upright suction creating members are located on opposite sides of a cap member for the gas inlet for the ventilator and formwith said cap member gas outlet passages.

The present invention has for its object to provide a ventilator of the type described with valves or dampers for closing and opening the outlet mouths of the gas passages and which in their open position function as bafiles to prevent decrease in eificiency of the ventilator by back drafts as will be described.

The invention is capable of being embodied in rectangular ventilator units capable of being mounted upon the roof of a building, and also is especially useful in the construction of ridge ventilators on the roof of a building, as it enables buildings having monitor tops to be provided with the improved ventilator at a minimum expense.

These and other features of the invention will be hereinafter described and pointed out in the claims.

The accompanying drawing represents in cross section a ventilator embodying this invention.

In the present instance, the invention is shown in a ridge ventilator erected upon the roof ID of a building or other structure. The roof l0 has erected upon it on opposite sides of an opening I2 in the roof at the ridge thereof, a suitable framework l3, I4 for supporting a cap member. I5 for the opening I2 in the roof and also upright suction members I 6, I1 located on opposite sides of the cap member I 5-and forming therewith gas passages I8, which are in direct communication with the ridge opening I2, which latter will be hereinafter referred to as the gas inlet for the ventilator.

The cap member I5 and the suction members I6, I! extend lengthwise of the roof and said suction members are extended above the cap member I5 and are provided with inwardly and upwardly extended portions or members I 9, 20, which co-operate with the cap member I5 to form outlet mouths 2 I, 22 for the gas passages I8, and also function as wind 'and rain bailles to oppose entrance of wind or rain into the gas passage I8 on the windward side of the ventilator.

Provision is made for closing the outlet mouths 2|, 22 of the gas passages I8 and to this end are employed dampers or valves 23, 24 afiixed to suitable frames or members 25, 26, which are pivoted or hinged at 21, 28 to the cap member I5 at the eaves thereof.

In the present instance the dampers or valves 23, 24 are represented as substantially flat plates or sheets which are moved in one direction to close the outlet mouths 2|, 22 by mechanism accessible from within the building, which mecha nism is represented as chains or cords 30, 3| and said dampers are moved in the opposite direction to open the dampers by weights 32, 33 on the pivoted supporting members 25, 26.

The upright suction members are preferably made substantially straight and are spaced from the side edges of the cap member I5 to form substantially wide passages 35, 36 between them for the free flow of gases out of the building, and said suction members are extended above the lower edges of the cap member a substantial distance and such as to have the upwardly inclined member I9, 20 form with the cap member I5 the outlet mouths 2|, 22 of greater width than the width of the gas passage 35 or 36, so as to still further facilitate the flow of gases out of the ventilator.

To this end the upper ends of the suction members I6, I! are extended above the peak of the cap member I5 and the inclined members I9, 20 extend upwardly at a different inclination from that of the inclined sides of the cap member, with the result that the distance between the upper end of each inclined member I9 or 20 and the outer side edges of the'cap member is of greater width than the width of the passage 35 or 36 between the cap member and the upright suction members I6, I1.

The upper ends of the inclined portions I9, 20 of the suction members I6, I! are located in a horizontal plane represented by the dotted line- 40, and in accordance with this invention, the dampers 23, 24 are made of such height as to have their upper ends lie in and preferably above the horizontal plane 40 in their opened and closed positions.

As a result of this construction, the dampers when closed effectively cover the outlet mouths 2|, 23 and prevent wind and rain from entering the ventilator, and when the dampers are opened the dampers act as baflies and prevent the emciency of the ventilator being diminished especially when the wind is flowing horizontally, under which wind conditions ventilators of this type are supposed to function at their maximum efficiency. With the wind flowing horizontally and the dampers opened as shown in the drawing, horizontal winds will strike either the baflle I6 or I1, and if such wind is blowing toward the suction member I6, it will strike a vertical extension or lip ll of the bafile l6 if such lip be used, and be deflected upwardly and then will pass over the ventilator and will thus be prevented from entering the ventilator at the lee or rear side of the ventilator.

If rain accompanies the wind it will strike the dampers, which act as baffles and direct the rain downward toward the suction members and onto the roof of the building. While it is preferred to provide the suction members I6, "with the lip 4|, it is not desired to limit the invention in this respect, as it may be omitted with a slight loss in efficiency, and in such case horizontally flowing winds will pass over the top of the inclined portion l9 or 2|] of the suction members and be bailied by the dampers and prevented from passing into the gas inlet l2 for the ventilator. The dampers are provided at their hinged end with suitable weep holes (not shown) for the escape of rain, and the suction members I6, 11 may be secured to the framework I 3, M with their lower edges raised slightly above the roof to form rain outlets for the ventilator.

From the above description it will be seen that the dampers or valves co-operate with the gas outlet passages of .the ventilator to open or close the same and provide comfortable working conditions within the building in both summer and winter without decreasing the efiiciency of the ventilator, and at the same time effect these desirable results at a minimum cost.

Having thus described the invention, what is claimed is:

1. The combination with a building provided with a roof having a ridge opening, of a cap member for said ridge opening, upright suction members co-operating with said cap member and constructed to form gas outlet passages communicating with the ridge opening and having outlet mouths above the side edges of said cap member, and dampers co-operating with said outlet mouths and constructed to open and close the same and to form in their open position bafiies for said gas outlet passages.

2. In a. ventilator, in combination, a cap mem ber, suction members co-operating therewith and constructed to form gas outlet passages having outlet mouths above the edges of said cap member, and dampers co-operating with said outlet mouths.

3. In a ventilator, in combination, a cap member, suction members located on opposite sides of said cap member and provided above the lower edges of the cap member with inwardly and upwardly inclined members forming outlet mouths with said cap member and having lips extended upwardly therefrom, and dampers extended upwardly to cover said outlet mouths in their closed position.

4. In a ventilator, in combination, a cap member, suction members co-operating therewith and constructed to form gas outlet passages having outlet mouths above the edges of said cap member, and dampers co-operating with said outlet mouths and constructed to open and close the same and to form in their open position baffles for said gas outlet passages.

GEORGE E. BLACK 

